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(A) Whenever a motor vehicle equipped with headlights is also equipped with any auxiliary lights or spotlight or any other light on the front thereof projecting a beam of an intensity greater than 300 candlepower, not more than a total of five of any such lights on the front of a vehicle shall be lighted at any one time when the vehicle is upon a highway.
(B) Any lighted light or illuminating device upon a motor vehicle, other than headlights, spotlights, signal lights, or auxiliary driving lights, that projects a beam of light of an intensity greater than 300 candlepower shall be so directed that no part of the beam will strike the level of the roadway on which the vehicle stands at a distance of more than 75 feet from the vehicle.
(C) (1) Flashing lights are prohibited on motor vehicles, except as a means for indicating a right or a left turn, or in the presence of vehicular traffic hazard requiring unusual care in approaching, or overtaking or passing. This prohibition does not apply to emergency vehicles, road service vehicles servicing or towing a disabled vehicle, rural mail delivery vehicles, vehicles as provided in R.C. § 4513.182 or a substantially equivalent municipal ordinance, highway maintenance vehicles, funeral hearses, funeral escort vehicles, and similar equipment operated by the Department or local authorities, which shall be equipped with and display, when used on a street or highway for the special purpose necessitating such lights, a flashing, oscillating or rotating amber light, but shall not display a flashing, oscillating or rotating light of any other color, nor to vehicles or machinery permitted by R.C. § 4513.11 or a substantially equivalent municipal ordinance to have a flashing red light.
(2) When used on a street or highway, farm machinery and vehicles escorting farm machinery may be equipped with and display a flashing, oscillating or rotating amber light, and the prohibition contained in division (C)(1) of this section does not apply to such machinery or vehicles. Farm machinery may also display the lights described in R.C. § 4513.11 or a substantially equivalent municipal ordinance.
(D) Except a person operating a public safety vehicle, as defined in R.C. § 4511.01(E), or a school bus, no person shall operate, move, or park upon or permit to stand within the right-of-way of any public street or highway any vehicle or equipment that is equipped with and displaying a flashing red or a flashing combination red and white light, or an oscillating or rotating red light, or a combination red and white oscillating or rotating light; and except a public law enforcement officer, or other person sworn to enforce the criminal and traffic laws of the state, operating a public safety vehicle when on duty, no person shall operate, move or park upon or permit to stand within the right-of-way of any street or highway any vehicle or equipment that is equipped with, or upon which is mounted, and displaying a flashing blue or a flashing combination blue and white light, or an oscillating or rotating blue light, or a combination blue and white oscillating or rotating light.
(E) This section does not prohibit the use of warning lights required by law or the simultaneous flashing of turn signals on disabled vehicles or on vehicles being operated in unfavorable atmospheric conditions in order to enhance their visibility. This section also does not prohibit the simultaneous flashing of turn signals or warning lights whether on farm machinery or vehicles escorting farm machinery when used on a street or highway.
(R.C. § 4513.17) (Rev. 2015)
(F) (1) Notwithstanding any other provision of law, a motor vehicle operated by a coroner, deputy coroner or coroner’s investigator may be equipped with a flashing, oscillating or rotating red or blue light and siren, whistle or bell capable of emitting sound audible under normal conditions from a distance of not less than 500 feet. Such a vehicle may display the flashing, oscillating or rotating red or blue light and may give the audible signal of the siren, whistle or bell only when responding to a fatality or a fatal motor vehicle accident on a street or highway and only at those locations where the stoppage of traffic impedes the ability of the coroner, deputy coroner or coroner’s investigator to arrive at the site of the fatality.
(2) This division (F) does not relieve the coroner, deputy coroner or coroner’s investigator operating a motor vehicle from the duty to drive with due regard for the safety of all persons and property upon the highway.
(R.C. § 4513.171) (Rev. 1999)
(G) Whoever violates this section is guilty of a minor misdemeanor.
(R.C. §§ 4513.17(F), 4513.171(B)) (Rev. 2010)